Influenza-like illness sentinel surveillance in one hospital in Medellin, Colombia. 2007-2012

Autor: Ana E. Arango, Alberto Laguna-Torres, Juan A. Galbis Pérez, Vidal Felices, Jorge Hernando Donado, Sergio Jaramillo, David Andrés Espinal, Josefina Garcia, Julia S. Ampuero
Rok vydání: 2014
Předmět:
Male
Medellin
Epidemiology
medicine.disease_cause
Adenovirus Infections
Human
Influenza A Virus
H1N1 Subtype
Pandemic
Influenza A virus
Young adult
Child
Respiratory Tract Infections
Phylogeny
Paramyxoviridae Infections
Respiratory tract infections
virus diseases
Middle Aged
Infectious Diseases
Influenza Vaccines
Virus Diseases
Child
Preschool
Human mortality from H5N1
surveillance
Female
Original Article
Seasons
Pulmonary and Respiratory Medicine
Adult
medicine.medical_specialty
Adolescent
Colombia
Real-Time Polymerase Chain Reaction
Adenoviridae
Young Adult
Internal medicine
respiratory viruses
Influenza
Human
medicine
Humans
Aged
Influenza-like illness
business.industry
Public Health
Environmental and Occupational Health
Virology
Influenza
Influenza B virus
business
Sentinel Surveillance
Zdroj: Influenza and Other Respiratory Viruses
ISSN: 1750-2659
Popis: Background The city of Medellin in Colombia has almost no documentation of the causes of acute respiratory infections (ARIs). As part of an ongoing collaboration, we conducted an epidemiologic surveillance for influenza and other respiratory viruses. It described the influenza strains that were circulating in the region along with their distribution over time, and performing molecular characterization to some of those strains. This will contribute to the knowledge of local and national epidemiology. Objectives To analyze viral etiologic agents associated with influenza like illness (ILI) in participants reporting to one General hospital in Medelllin, Colombia. Results From January 2007 to December 2012, a total of 2039 participants were enrolled. Among them, 1120 (54·9%) were male and 1364 (69%) were under the age of five. Only 124 (6%) were older than the age of 15. From all 2039 participants, 1040 samples were diagnosed by either isolation or RT-PCR. One or more respiratory viruses were found in 737 (36%) participants. Of those, 426 (57·8%) got influenza A or B. Adenoviral and parainfluenza infections represented 19·1% and 14·9% of viral infections, respectively. Influenza A was detected almost throughout the whole year except for the first quarter of 2010, right after the 2009 influenza A pandemic. Influenza B was detected in 2008, 2010, and 2012 with no pattern detected. During 2008 and 2010, both types circulated in about the same proportion. Unusually, in many months of 2012, the proportion of influenza B infections was higher than influenza A (ranging between 30% and 42%). The higher proportion of adenovirus was mainly detected in the last quarter of years 2007 and 2010. Adenoviral cases are more frequent in participants under the age of four. Conclusions The phylogenetic analysis of influenza viruses shows that only in the case of influenza A/H1N1, the circulating strains totally coincide with the vaccine strains each year.
Databáze: OpenAIRE
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